关于spring cloud eureka整合ribbon实现客户端的负载均衡

1. 实现eureka整合ribbon非常简单,

1.1.首先引入所需maven依赖

 <dependency>

     <groupId>org.springframework.boot</groupId>

     <artifactId>spring-cloud-starter-ribbon</artifactId>

 </dependency>

1.2.在创建RestTemplate的Bean时加上@LoadBalanced注解

 @Bean

 @LoadBalanced　　// 为restTemplate

 public RestTemplate restTemplate() {

     return new RestTemplate();

 }

1.3.在注入RestTemplate时加上@LoadBalanced注解

 @Autowired

 @LoadBalanced

 private RestTemplate restTemplate;

　　这里要注意几点:

　　　　1.3.1.在注入RestTemplate时, 一定要加上@LoadBalanced注解,

　　　　1.3.2.在eureka整合了ribbon之后, 使用RestTemplate时, 第一个参数URL必须是服务生产者的spring.application.name:的值, 也就是服务生产者的serviceId

　　否则会报java.lang.IllegalStateException: No instances available for ********异常,如下:

 java.lang.IllegalStateException: No instances available for 127.0.0.1

     at org.springframework.cloud.netflix.ribbon.RibbonLoadBalancerClient.execute(RibbonLoadBalancerClient.java:75) ~[spring-cloud-netflix-core-1.3.1.RELEASE.jar:1.3.1.RELEASE]

     at org.springframework.cloud.client.loadbalancer.LoadBalancerInterceptor.intercept(LoadBalancerInterceptor.java:55) ~[spring-cloud-commons-1.2.2.RELEASE.jar:1.2.2.RELEASE]

     at org.springframework.http.client.InterceptingClientHttpRequest$InterceptingRequestExecution.execute(InterceptingClientHttpRequest.java:86) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at org.springframework.cloud.netflix.metrics.MetricsClientHttpRequestInterceptor.intercept(MetricsClientHttpRequestInterceptor.java:64) ~[spring-cloud-netflix-core-1.3.1.RELEASE.jar:1.3.1.RELEASE]

     at org.springframework.http.client.InterceptingClientHttpRequest$InterceptingRequestExecution.execute(InterceptingClientHttpRequest.java:86) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at org.springframework.http.client.InterceptingClientHttpRequest.executeInternal(InterceptingClientHttpRequest.java:70) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at org.springframework.http.client.AbstractBufferingClientHttpRequest.executeInternal(AbstractBufferingClientHttpRequest.java:48) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at org.springframework.http.client.AbstractClientHttpRequest.execute(AbstractClientHttpRequest.java:53) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:659) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:620) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at org.springframework.web.client.RestTemplate.getForObject(RestTemplate.java:294) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at org.springframework.web.client.RestTemplate$$FastClassBySpringCGLIB$$aa4e9ed0.invoke(<generated>) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204) ~[spring-core-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:738) ~[spring-aop-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) ~[spring-aop-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:85) ~[spring-aop-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at org.springframework.cloud.netflix.metrics.RestTemplateUrlTemplateCapturingAspect.captureUrlTemplate(RestTemplateUrlTemplateCapturingAspect.java:33) ~[spring-cloud-netflix-core-1.3.1.RELEASE.jar:1.3.1.RELEASE]

     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_151]

     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_151]

     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_151]

     at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_151]

     at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:629) ~[spring-aop-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:618) ~[spring-aop-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:70) ~[spring-aop-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92) ~[spring-aop-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:673) ~[spring-aop-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at org.springframework.web.client.RestTemplate$$EnhancerBySpringCGLIB$$b2d47b63.getForObject(<generated>) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at com.iot.dywl.demo.spring.cloud.eureka.movie.controller.MovieController.findUserByIdRestTemplate(MovieController.java:46) ~[classes/:na]

     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_151]

     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_151]

     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_151]

     at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_151]

     at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97) ~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827) ~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738) ~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) ~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967) ~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901) ~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) ~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861) ~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at javax.servlet.http.HttpServlet.service(HttpServlet.java:635) ~[tomcat-embed-core-8.5.23.jar:8.5.23]

     at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) ~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) ~[tomcat-embed-core-8.5.23.jar:8.5.23]

     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-8.5.23.jar:8.5.23]

     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar:8.5.23]

     at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) ~[tomcat-embed-websocket-8.5.23.jar:8.5.23]

     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.23.jar:8.5.23]

     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar:8.5.23]

     at org.springframework.boot.web.filter.ApplicationContextHeaderFilter.doFilterInternal(ApplicationContextHeaderFilter.java:55) ~[spring-boot-1.5.9.RELEASE.jar:1.5.9.RELEASE]

     at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.23.jar:8.5.23]

     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar:8.5.23]

     at org.springframework.boot.actuate.trace.WebRequestTraceFilter.doFilterInternal(WebRequestTraceFilter.java:110) ~[spring-boot-actuator-1.5.9.RELEASE.jar:1.5.9.RELEASE]

     at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.23.jar:8.5.23]

     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar:8.5.23]

     at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.23.jar:8.5.23]

     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar:8.5.23]

     at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:108) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.23.jar:8.5.23]

     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar:8.5.23]

     at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.23.jar:8.5.23]

     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar:8.5.23]

     at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.23.jar:8.5.23]

     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar:8.5.23]

     at org.springframework.boot.actuate.autoconfigure.MetricsFilter.doFilterInternal(MetricsFilter.java:106) ~[spring-boot-actuator-1.5.9.RELEASE.jar:1.5.9.RELEASE]

     at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE]

     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.23.jar:8.5.23]

     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar:8.5.23]

     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199) ~[tomcat-embed-core-8.5.23.jar:8.5.23]

     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-8.5.23.jar:8.5.23]

     at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478) [tomcat-embed-core-8.5.23.jar:8.5.23]

     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) [tomcat-embed-core-8.5.23.jar:8.5.23]

     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81) [tomcat-embed-core-8.5.23.jar:8.5.23]

     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) [tomcat-embed-core-8.5.23.jar:8.5.23]

     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) [tomcat-embed-core-8.5.23.jar:8.5.23]

     at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803) [tomcat-embed-core-8.5.23.jar:8.5.23]

     at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-8.5.23.jar:8.5.23]

     at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) [tomcat-embed-core-8.5.23.jar:8.5.23]

     at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1459) [tomcat-embed-core-8.5.23.jar:8.5.23]

     at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-8.5.23.jar:8.5.23]

     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_151]

     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_151]

     at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.23.jar:8.5.23]

     at java.lang.Thread.run(Thread.java:748) [na:1.8.0_151]

关于spring cloud eureka整合ribbon实现客户端的负载均衡的更多相关文章

SpringCloud系列七：使用Ribbon实现客户端侧负载均衡
1. 回顾在前面,已经实现了微服务的注册与发现.启动各个微服务时,Eureka Client会把自己的网络信息注册到Eureka Server上. 但是,在生成环境中,各个微服务都会部署多个实例,因 ...
5.使用Ribbon实现客户端侧负载均衡
Ribbon实现客户端侧负载均衡 5.1. Ribbon简介 Ribbon是Netflix发布的开源项目,主要功能是提供客户端的软件负载均衡算法 ...
Spring Cloud入门教程-Ribbon实现客户端负载均衡
简介我们继续以之前博客的代码为基础,增加Ribbon组件来提供客户端负载均衡.负载均衡是实现高并发.高性能.可伸缩服务的重要组成部分,它可以把请求分散到一个集群中不同的服务器中,以减轻每个服务器的负 ...
Spring Cloud 入门教程(五)： Ribbon实现客户端的负载均衡
接上节,假如我们的Hello world服务的访问量剧增,用一个服务已经无法承载, 我们可以把Hello World服务做成一个集群. 很简单,我们只需要复制Hello world服务,同时将原来的端 ...
spring boot 2.0.3+spring cloud （Finchley）2、搭建负载均衡Ribbon （Eureka+Ribbon+RestTemplate）
Ribbon是Netflix公司开源的一个负载均衡组件,将负载均衡逻辑封装在客户端中,运行在客户端的进程里. 本例子是在搭建好eureka的基础上进行的,可参考spring boot 2.0.3+sp ...
一起来学Spring Cloud | 第三章：服务消费者 (负载均衡Ribbon)
一.负载均衡的简介: 负载均衡是高可用架构的一个关键组件,主要用来提高性能和可用性,通过负载均衡将流量分发到多个服务器,多服务器能够消除单个服务器的故障,减轻单个服务器的访问压力. 1.服务端负载均衡 ...
手把手带你利用Ribbon实现客户端的负载均衡
之前的文章<SpringCloud搭建注册中心与服务注册>介绍了注册中心的搭建和服务的注册,本文将介绍下服务消费者通过Ribbon调用服务实现负载均衡的过程. 本文目录一.Ribbon服 ...
spring cloud使用zuul实现反向代理和负载均衡
首先,这篇文章参考的是http://blog.didispace.com/springcloud5/这位大牛的博客.本人是通过这篇博客来学习zuul的,现在写的博客只是个人在学习时个人的一些感受和理解 ...
Spring Cloud Eureka整合使用和配置
遵循SpringBoot三板斧服务端第一步加依赖 <dependency> <groupId>org.springframework.cloud</groupId&g ...

随机推荐

[转]使用fdisk磁盘分区和 Linux 文件系统
概述在本文中,学习磁盘分区和 Linux 文件系统相关内容.学习: 创建分区使用 mkfs 命令来设置 ext2.ext3.ext4.xfs.Reiser v3 和 vfat 文件系统创建和管理 ...
@JoinColumn 匹配关联多个字段
两张表结构如下 TABLE_A: ID, COLA1, COLA2 TABLE_B: ID, A_ID, COLB1, COLB2 A和B是一对多的关系. 我在B的BEAN上面,通过Anotation ...
【BZOJ2006】超级钢琴（RMQ，priority_queue）
题意: 思路: 用三元组(i, l, r)表示右端点为i,左端点在[l, r]之间和最大的区间([l, r]保证是对于i可行右端点区间的一个子区间),我们用堆维护一些这样的三元组. 堆中初始的元素为每 ...
SeaJS项目完整实例【转】
index.html——主页面. sea.js——SeaJS脚本. init.js——init模块,入口模块,依赖data.jquery.style三个模块.由主页面载入. data.js——data ...
HDU 1402 大数乘法 FFT、NTT
A * B Problem Plus Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Other ...
c++ 高性能日志库(muduo_AsyncLogging)
c++ 高性能日志库(muduo_AsyncLogging) 实现一个高效的网络日志库要解决那些问题? 首先明确一下问题的模型,这是一个典型的多生产者单消费者问题,对于前端的日志库使用者来说,应该做 ...
Java操作XML牛逼利器JDOM&DOM4J
JDOM JDOM 是一种使用 XML(标准通用标记语言下的一个子集) 的独特 Java 工具包,用于快速开发 XML 应用程序. JDOM 官方网站:http://www.jdom.org/ 利 ...
JAVA实验--统计文章中单词的个数并排序
分析: 1)要统计单词的个数,就自己的对文章中单词出现的判断的理解来说是:当出现一个非字母的字符的时候,对前面的一部分字符串归结为单词 2)对于最后要判断字母出现的个数这个问题,我认为应该是要用到ma ...
Meteor部
一个关于 Meteor 主要事项就是如何轻松部署应用程序.当程序完成后,有一个简单的方法来和世界分享你的应用程序.所有需要做的就是在运行命令提示符窗口下面的代码. C:\Users\Administr ...
UVALive3211- Now or later(二分+2-SAT)
题目链接题意:有n架飞机.每架飞机都能够选择早着陆和晚着陆两种方式之中的一个,且必须选择一种. 任务就是安排全部飞机着陆时.相邻两个着陆时间间隔的最小值尽量大. 思路:用二分处理最小值尽量大.该题目 ...

关于spring cloud eureka整合ribbon实现客户端的负载均衡

关于spring cloud eureka整合ribbon实现客户端的负载均衡的更多相关文章

随机推荐

热门专题